Life Without Oxygen?

Image courtesy of the Institute for Exploration, the University of Rhode Island (URI) Graduate School of Oceanography (GSO), and the URI Institute for Archaeological Oceanography.

Why It Matters

It's A Job

Many of you may have heard of deep-sea vent communities. This term commonly refers to areas around hydrothermal vents where warm mineral rich water gushes out of the earth, and chemosynthetic bacteria use H2S (hydrogen sulfide) to power an ecosystem which doesn't depend on light. But hydrogen sulfide is not the only potential fuel source in the deep sea, in some areas you have communities built around chemosynthetic bacteria which utilize methane (CH4). Here is a look at a methane community in the Black Sea scientists are particularly interested, not only for the methane seep but also because it occurs in the anoxic Black Sea. Other methane seeps are known from oxygenated waters in other parts of the ocean (e.g. the Gulf of Mexico or Oregon) but scientists feel these anoxic types may provide clues as to how life worked when oxygen (O2) was rare on our planet. The bubbles you see in the video are actually methane gas escaping from the sea floor.

Go here to find out more about why these communities interest scientists: